Mercury 150 EFI Service Manual page 152

Throttle Position Sensor
The Throttle Position Sensor (TPS) is not adjustable. The Throttle Position Sensor func-
tion can be monitored by using the DDT. All voltages should be within specifications listed.
Voltage progression from idle to wide open throttle should be smooth. If voltage is out of
specification or progression is erratic, TPS should be replaced.
IGNITION Throttle Position Sensor
SYSTEM @ Idle
@ W.O.T.
Idle Speed
The idle speed is not adjustable. Idle speed is controlled by the ECM by advancing or re-
tarding the ignition timing to maintain an idle rpm of approximately 700 in neutral and 625
in gear.
Throttle Cable Installation
1. With end of throttle cable connected to throttle lever, hold throttle lever (a) against idle
stop (b). Adjust throttle cable barrel to slip into barrel recess of control cable anchor
bracket, with a light preload of throttle lever against idle stop. Lock barrel in place.
IMPORTANT: Excessive preload on throttle cable will cause difficulty when shifting
from "FORWARD" to "NEUTRAL" (readjust throttle cable barrel, if necessary).
c
a -
b -
2. Check preload on throttle cable by placing a thin piece of paper between idle stop
screw (a) and idle stop (b). Preload is correct when paper can be removed without
tearing, but has some drag on it (readjust throttle barrel, if necessary).
a -
90-883728 JULY 2001
Throttle Lever
Idle Stop
a
Idle Stop Screw
TIMING, SYNCHRONIZING & ADJUSTING
0.19 – 1.0 vdc
3.45 – 4.63 vdc
a
d
d -
b
b -
b
57838
c - Cable Barrel – Adjust
To Hold Idle Stop
Screw Against Stop
Idle Stop Screw
57839
Idle Stop
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